Joris Graaumans is senior lecturer at the Fontys University of Applied Sciences. He teaches web development techniques, interaction design and usability testing. Prior to this, he was IT consultant at Atos and did a PhD in Information Sciences at the University of Utrecht. Heloves to run, cook a decent meal and build great sounding tube guitar amplifiers.

Estelle Weyl is a author, trainer and freelancer. She has consulted for Kodakgallery, SurveyMonkey, Yahoo!, Apple, and many others. Estelle provides tutorials and detailed grids for CSS3 and HTML5 browser support in her blog. She is the author of Mobile HTML5 (O'Reilly, 2013), HTML5: The Definitive Guide (O'Reilly, 2014) and HTML5 and CSS3 for the Real World (Sitepoint, May 2011). While not coding, she works in construction, de-hippifying her 1960's throwback abode.

Scott Mattocks is the Director of Development at GSN Digital. He leads a team of highly skilled developers, driving growth and scale of GSN's on-line games platforms. Scott is the author of Pro PHP-GTK and WebSockets: An introduction to real-time communications for the Web. Scott lives in Massachusetts with his wife and four kids.

Erwin Geirnaert is a well-known application security expert and co-founder of ZIONSECURITY, a Belgian security company specialized in mobile and web application security. Erwin has hands-on experience with security testing and securing mobile banking applications but also mobile games and the back-ends. Erwin has presented at different conferences like Javapolis, OWASP EU Conference, Eurostar and Infosecurity. More at www.zionsecurity.com/blog and @ZIONSECURITY

Lee is working for Sencha Inc; Sencha equips developers with frameworks, tools and services to help them build awesome applications using HTML5 and JavaScript. As a technical trainer she teaches Sencha Touch & Ext JS to engineers from all over Europe. Lee has been developing sites and applications for the web since 2003. Before Sencha she worked as a lead (front)-end developer. Currently Lee is writing a cookbook for O'Reilly about Sencha Touch.

Parashuram is a programmer and likes to spend his time writing code. He has worked on a number of projects and also blogs about the interesting things he comes across. He writes a lot of Javascript with HTML and CSS in addition to Java and Python for the backend. 

Brian Ford has been programming for as long as he can remember and involved in web technology for nearly 8 years. He is not only a member of the AngularJS core team, but also blogs extensively, and wrote the AngularJS Batarang, a debugging tool for AngularJS apps. Brian is currently finishing up his degree at the University of Michigan, after which he will continue working on the Angular team at Google.

Dan has over 8 years experience developing innovative web-based applications using a variety of technologies, and specialises in ASP.NET C# and JavaScript. He established the South-West England Sencha Meetup Group in 2011, to help bring the developer community together in the region.In early 2012, Dan joined Sencha as one of their Sales Engineers in Europe, where he provides pre-sales technical assistance regarding the Sencha product line.

Fokke Zandbergen has been online since 1996 and began the 30th Dutch blog in 2000. In 2001 he successfully created and sold Write2Me. Serving over 100.000 guestbooks, it was one of the first to offer a mobile (WAP) version.

After 5 years of traveling and living in Hong Kong for 6 months, Fokke finally settled down. He has worked as a consultant and developer at a small webdesign agency in The Netherlands before going freelance again this year.

As an "app imagineer" Fokke loves both architecting and developing native mobile apps using Appcelerator's Titanium platform. He is a TCAD certified Titanium developer and promotes the platform as a meet up co-organizer and community "Titan".

Sarah Allen is a serial innovator with a history of developing leading-edge products, such as After Effects, Shockwave, Flash video, and OpenLaszlo. She has a habit of recognizing great and timely ideas, finding talented teams, and creating compelling software. She has led small and large teams and confidently turns vision into reality.

Brechtje de Leij works at Sanoma Media and is responsible for the mobile strategy and development of the newscluster. The biggest title is NU.nl, the number one Dutch online news site and number one most downloaded Dutch app. Brechtje has over 10 years of experience in online product management, previously working for the eCommerce company Greetz, social & mobile media company Mobillion and for Reed Elsevier.Twitter: @brechtjedeleij

Paul Verbeek is a front-end webdeveloper at Netvlies. Here he's established the first Open Device Lab of the Netherlands. He is a volunteer at Fronteers where he helps to organise webdevelopment meet-ups. He's passionate about creating beautiful and functional websites that work on all devices, mobile and not-so-mobile.

I am a 36 year old self-employed web developer from Amsterdam and member of the jQuery Mobile development team. I work almost fulltime on the jQuery Mobile project.My Linkedin profile: http://www.linkedin.com/in/jasperdegroot 

Sidney Maestre is the Platform Evangelist for StackMob, a leading provider of backend services for mobile developers. He spent the last few years building mobile apps and sharing his knowledge with others. These efforts included speaking at Adobe MAX, 360iDev, SenchaCon, HTML5DevConf, Silicon Valley Code Camp, creating two courses, jQuery Mobile for Beginners and Learn Backbone.js + StackMob, for the uDemy.com platform and organizing the Bay Area Mobile meetup.

Judy plays Starcraft II and speaks in Na'vi, and is a serial hackathon winner who specializes in combining new technologies in innovative ways. On non-weekends, she develops web and mobile applications at Blazing Cloud. She loves rainbows, dancing, and the San Francisco tech community, contributing by leading the Women Who Code SF meetup group and routinely volunteering at RailsBridge workshops. @judytuna

John Arne is a mobile guy. He has been an active member and thought leader in the global mobile community since the late nineties.John Arne is a developer by trade, and truly believe that the key to success is a happy end user, and that innovative use of technology will help achieve that truly optimal user experience. Coding now is just done for recreation as he is now heading the Innovation and Products team at Mobiletech, which he also invented and co-founded.

Jason Kneen has been coding since the early 80s when he first got his hands on a Commodore VIC-20 and wrote his first "Hello World" program. In the 1990s he was a successful author of best-selling Psion Series 5 applications like "Backlite+" and "Extrabars" and also built e-commerce platforms on WAP and Windows Mobile.

These days he develops web apps with ASP / .NET and native mobile apps with Appcelerator's Titanium platform.
When he's not getting his hands dirty coding, he works with companies around the world as a development lead, architect and mentor - supporting and assisting their own development teams using Titanium. He's an advocate and supporter of the Titanium Platform, a TCAD Certified Developer, and a community "Titan". 

Jason is married, has three amazing children, and lives in the beautiful UK Countryside. He tweets as @jasonkneen and @bouncingfish.

Ade is a Senior Developer Advocate in Google's London office and works on the Google+ project. Over the last decade he's worked on trading systems for a variety of investment banks as well as on Google's advertising and mobile search systems. He's also the co-author of "Apprenticeship Patterns": a book that teaches you how to learn to be a great programmer. He's particularly interested in Developer Experience, distributed systems and the future of online news.

Kevlin is an independent consultant, speaker, writer and trainer. His development interests are in patterns, programming, practice and process. He has been a columnist for various magazines and web sites and is co-author of A Pattern Language for Distributed Computing and On Patterns and Pattern Languages, two volumes in thePattern-Oriented Software Architecture series. He is also editor of the 97 Things Every Programmer Should Know site and book.

Eric Durocher is a senior software developer for IBM, in France. He has been a member of the ILOG Visualization team since 1997 and is currently the technical leader of the Dojo Mobile development team. Eric has previously worked as developer and architect on most IBM ILOG visualization products: Views, JViews, .NET visualization, Elixir, and IBM Dojo Diagrammer. 

Christoph Martens is a developer and researcher in different areas. He tries to push technologies further and explore their limits and his focus is primary on bleeding edge technologies like JavaScript, C++ and V8.

In 2010 – 2012 he worked for Zynga, where he was developing an HTML5 game engine for millions of users. He used the gained experience to found his own environment-independent game engine lycheeJS. He also likes hacking flying drones, firmwares and all other pieces of low-level hardware while still loving to develop on his V8GL runtime.

Martin is a software engineer and community manager at Ibuildings in the Netherlands. He started programming with PHP and picked up Javascript along the way, he has become very knowledgeable with both in the past decade. 

Eamon Leonard is an advisor to start-ups, an angel investor, a tech community organiser and has an interest in cloud platforms and developer tools. Based in Ireland, he is VP Developers³ at Engine Yard, having joined the company through their acquisition of Orchestra, a PHP Platform-as-a-Service he co-founded in 2011.

Sergi works at Telenor Comoyo on Firefox OS and regularly gives talks about it. Before that, he worked at Cloud9 IDE making an online IDE entirely in Node.js and JavaScript, and before that he lead the team that implemented the webkit framework that run the UIs in modern TomTom devices. He lives in Amsterdam, where he organizes the successful AmsterdamJS meetup and enjoys the wonderful Dutch weather.

Jan Jongboom got in a real life fight when someone declared javascript 'just some scripting language'.  During the day he channels his javascript love as a member of the Firefox OS core team at Telenor Comoyo, making bad jokes about VBScript and dreaming of happy hour. The only native Brit in his previous company described him in one word: 'cheeky'. You can see him live on stage regularly, with talks about javascript, Firefox OS and mobile development.